JP2002267585A - Device for evaluating plasma display panel and manufacturing process for panel module of plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evaluate the presence or no presence of danger of the breakage of a panel caused by thermal stress producing by temperature difference between a display part and a non-display part of the panel. SOLUTION: A heater part 31 compulsorily applying heat to the panel 11 or a supporting member of the panel 11 is installed, and the thermal stress caused by heat generating by displaying an assumed image is reproduced to realize the evaluation of the panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plasma display panel manufacturing process and quality evaluation.

[0002]

2. Description of the Related Art In recent years, a plasma display device has become popular as a device capable of displaying television images and the like on a thin and large screen. However, the plasma display device has a problem that the temperature of the plasma display panel (PDP) locally rises due to discharge light emission in the display unit.

For this reason, conventionally, measures have been taken to equalize the temperature of the entire surface of the PDP, promote heat radiation, and reduce the temperature rise. Japanese Patent Application Laid-Open No. 10-116036 is related to this type of technology.

[0004]

SUMMARY OF THE INVENTION However, PDP
There is a display unit displaying an image and a non-display unit other than the display unit. No consideration is given to high thermal stress generated by a temperature difference between the display unit and the non-display unit.

Further, the stress resistance of the PDP is reduced due to the high temperature baking process repeated in the PDP manufacturing process, the scratches on the glass surface generated when moving between the processes, and the variation in the fine scratches on the end surface treatment. Is known to be significantly lower than the inherent stress resistance, but it is extremely difficult to quantitatively grasp this within a small variation range. If the high thermal stress generated by the temperature difference between the display part and the non-display part of the PDP exceeds the stress resistance of the PDP,
There is a risk of damaging the PDP. In order to confirm whether or not there is a danger of breakage of the PDP, it is possible to actually display and confirm a specific image that reproduces a high thermal stress, that is, a high temperature difference, in an image that can be actually displayed. In order to confirm the presence or absence of a risk of damage by displaying an image on the PDP, a process for connecting the PDP that has been damaged as a result to an external control circuit, and mounting and wiring work for driving the external control circuit are performed. There was a problem that members were wasted.

An object of the present invention is to provide a PDP capable of confirming whether there is a danger of PDP panel damage without connecting to an external control circuit or attaching an external control circuit.
PD that can provide an evaluation device and confirm the suitability of the PDP manufacturing process and the suitability of changes in the manufacturing process
A P evaluation device is provided.

In addition, the step of confirming whether there is a danger of panel breakage of the PDP using the panel evaluation apparatus is arranged before the connection with the external control circuit or the mounting of the external control circuit is performed. PDP manufacturing process is proposed.

Further, in the new development of PDPs, the most suitable material can be extracted without using the panel evaluation device when selecting the materials to be used and selecting the materials to be used, without actually producing the actual PDP until the final stage. At the same time, it is possible to clarify the temperature difference allowable for the PDP under development, that is, the product specification.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, one or both surfaces of a glass surface or a glass holding member of a plasma display panel which does not have a control driving circuit for a plasma display element are provided. A heater unit for applying heat or heat and external pressure is provided. The heater unit forcibly applies heat or heat and external pressure to the panel, and the applied thermal stress causes breakage or abnormality in the panel. A plasma display panel evaluation device was used to confirm whether or not there would be any.

Further, in order to make the heating temperature of the heater portion used for heating uniform, the heater portion is constituted by a heat pipe which is a member having good heat conduction.

Further, a moving means for moving the heater is provided, and the heater can be freely moved by the moving means to change a heating position.

In addition, the front glass and the rear glass of the plasma display panel are fixed with a frit material so that the plasma display panel evaluation apparatus configured as described above can be applied to the panel module manufacturing process of the plasma display. Inject necessary injection gas into
A glass panel manufacturing process for sealing the glass panel,
A plasma module comprising a panel module manufacturing process for mounting an external control circuit and a drive circuit on the plasma display panel from the glass panel manufacturing process, an inspection / management process for evaluating and confirming quality, and a shipping process for packing. In the display panel module manufacturing process, a panel damage evaluation step of checking whether there is a danger of damage to the thermal stress of the panel using the above-described plasma display panel evaluation apparatus, between the glass panel manufacturing step and the panel module manufacturing step The configuration was added.

[0013] With this configuration, it is possible to require discharge emission of the plasma display panel without connecting the external control circuit to the panel, mounting a drive circuit, and performing wiring work between the circuits and input of control signals. Instead, it was possible to evaluate and confirm the presence or absence of the risk of breakage of the panel.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 1 will be described. Figure 1 shows a plasma display panel (hereinafter abbreviated as PDP)
1 shows a schematic plan view of FIG.

The PDP 11 seals the front glass 1 and the rear glass 2 with frit glass 3 to form a discharge space (cell) by fine partition walls in a display area 5 for displaying an image. The ultraviolet rays generated by the discharge are converted into visible light by irradiating the phosphor applied to the partition walls, and transmitted through the front glass 1 to display an image.

Further, in addition to the external electrode portion that does not display an image and the frit glass 3, the PDP has a non-secured area for securing electrode wires from the display region outside the display region 5 to the frit glass 3. It has a display area 4.

In order to display an image in the display area 5, a portion E where plasma discharge is controlled and visible light is emitted is a display portion, and a portion other than the display portion of the PDP is a non-display portion. The external electrode section, the frit glass, and the non-display area). The temperature of the glass surface of the display portion E rises due to discharge for image display, and a temperature difference is generated between the glass surface and the non-display portion, thereby generating thermal stress.

Next, FIG. 2 will be described. FIG. 2 shows an embodiment of the present invention. (A) is a plan view showing the configuration of the present apparatus. (B) is a plan layout view assuming the actual evaluation state of the panel.

(C) and (D) are side views assuming an actual evaluation state of the panel. (E) is a configuration diagram for enabling the heater unit to be moved to any position.
'Is a structural diagram of a portion that embodies the arrangement movement.

In FIG. 2, reference numeral 11 denotes the PDP described with reference to FIG.
It is.

This apparatus uses PDP1 to evaluate PDP.
1 and a heat or heat and external pressure PD
It comprises a heating unit (heater unit) 31 to be provided to P11, a timer unit 41 for controlling the time of the heater unit 31, a temperature adjusting unit 51 of the heater unit 31, and the like.

One or a plurality of heater units 31 may be provided. In the case of one heater unit, a structure capable of disposing and moving it at an arbitrary position is provided. As shown in the figure, a mechanism for fitting the heater unit 31 to the slide rail 61 as shown by E ', sliding the slider unit to an arbitrary position, moving the arrangement position, and fixing the unit with screws or the like is provided. The heating unit can be changed according to the assumed display image.

It is also desirable to use a heat pipe for the heater section 31 so that the heating section can be made uniform.

The heater may be constituted by a far infrared heater or a hot air heater, and the PDP 11 may be heated in a non-contact manner as in the heater 31 'in FIG.

The timer 41 is constructed as described above.
The heat adjusted by the heating control unit such as the temperature control unit 51 or the like is transferred to the PDP 1 using the heater unit 31 or the heater unit 31 ′.
1 can be heated to evaluate whether there is a risk of panel breakage due to thermal stress generated by the image display of the PDP without the need to cause the PDP to emit visible light by actual discharge.

FIG. 3 shows an example of a method for controlling the temperature of the heating section (heater section) of the present apparatus.

FIG. 5F is a sectional layout diagram assuming an actual evaluation state of the panel when the heater is heated by directly contacting the PDP.

FIG. 3G is a sectional layout view assuming an actual evaluation state of the panel when the heater is heated without contacting the PDP.

In FIG. 3, reference numeral 11 denotes P described in FIG.
DP.

First, (F) will be described. In (F), 31 is a heating unit (heater unit) described in FIG.
It is. Reference numeral 111 denotes a temperature sensor a which is attached to the heater unit 31 itself and detects a heating temperature of the heater unit 31. 1
Reference numeral 12 denotes a temperature sensor b for detecting a heat receiving temperature attached to a heat receiving surface of the PDP 11 heated by the heater 31. Reference numeral 113 denotes a temperature sensor c attached to a non-heat receiving surface very adjacent to the heat receiving surface of the PDP 11.

By correcting the deviation of the temperatures detected by the temperature sensors a, b and c and controlling the heating temperature of the heater 31 so that the temperature can be kept constant, the evaluator's desired heating temperature can be made more faithful. To the PDP 11.

Next, (G) will be described. In (G), 31 'is a heating unit (heater unit) for applying heat in a non-contact manner to the PDP 11 constituted by the far-infrared heater or hot air heater described in FIG. Reference numeral 111 'denotes a temperature sensor a' which is attached to the heater section 31 'itself and detects a heating temperature of the heater section 31'. 112 'is the heater 31
Is a temperature sensor b 'for detecting a heat receiving temperature attached to the heat receiving surface of the PDP 11 heated by the PDP.

Temperature sensor a 'and temperature sensor b'
By controlling the heating temperature of the heater 31 ′ so as to correct the deviation of the temperature detected by the above and keep it constant, it is possible to give the evaluator a desired heating temperature to the PDP 11 more faithfully.

Referring to FIG. FIG. 4 illustrates a typical schematic manufacturing process of a panel module of a plasma display.

FIG. 4H shows a conventional panel module manufacturing process. The panel module manufacturing process is “glass panel manufacturing process” 10, “panel module manufacturing process” 30, “inspection / quality control process” 4
0, and “shipping process” 50.

The major factors (starting points) of the risk of panel breakage include fine scratches in the glass edge treatment and glass scratches generated while moving on the process, and those repeated in the above “glass panel manufacturing process”. It is considered that the strength of the glass properties is reduced due to the firing operation, but most of them are affected by the “panel glass manufacturing process” and cause individual variations.

Whether or not there is a danger of glass breakage is determined by the inspection /
In the quality control process, the panel is selected by lighting test (aging) or overloading (excessive discharge with a pattern that easily generates thermal stress) test (screening). It can be said that all the process operations of the above “panel module manufacturing process” and the members that cannot be used for other panels are wasted.

(I) shows a manufacturing process proposed by the present invention. The features of the manufacturing process (I) are “glass panel manufacturing process” 10 and “panel module manufacturing process”.
"Plasma display evaluation device" of the present invention during 30
And a "panel damage evaluation step" 20 for checking whether there is a risk of panel damage by forcibly applying heat to the panel and applying thermal stress. Before the “panel module manufacturing process”, it is confirmed whether there is a danger of panel breakage, and by sieving, the panel is actually subjected to the “inspection / quality control process” through the “panel module manufacturing process”. The panel module manufacturing process for emitting light to a panel that may be damaged as a result can be confirmed at an early stage, and it is possible to confirm the panel damage that has been discovered by discharging and emitting light. "Can be omitted.

Therefore, an efficient plasma display which can avoid the actual work of the "panel module manufacturing process" and the waste of members which cannot be used for other panels for a panel which may be damaged as a result. Panel module manufacturing process can be provided.

[0040]

According to the present invention, in a manufacturing process of a plasma display panel (PDP), it is possible to evaluate whether or not there is a risk of breakage due to thermal stress of a PDP in a process before an image can be displayed. A simple PDP manufacturing process can be provided.

Further, it is possible to provide a PDP evaluation apparatus capable of confirming in advance the suitability of the PDP manufacturing process and the suitability of the change of the manufacturing process.

Furthermore, in the new development of PDPs, the most suitable material can be extracted without the need for trial production of the actual PDP to the final stage, if the panel size is different, or if it is used when selecting each material to be used. Temperature difference allowable for PDP, that is, P that can clarify product specifications
A DP evaluation device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a plasma display panel.

FIG. 2 is a configuration diagram showing an embodiment of the present invention.

FIG. 3 is a detailed diagram showing an embodiment of the present invention.

FIG. 4 is a manufacturing process diagram of a PDP proposed by the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front panel of a plasma display panel, 2 ... Rear panel of a plasma display panel, 3 ... Frit glass,
4 non-display area, 5 display area, 11 plasma display panel, 21 support, 31 heater part, 31
'... non-contact heater section, 41 ... timer section, 51 ... temperature adjustment section, 61 ... slide rail, 111 ... temperature sensor a, 111' ... temperature sensor a ', 112 ... temperature sensor b, 112' ... temperature sensor b '. 113: temperature sensor c, 10: glass panel manufacturing process, 101: front glass manufacturing, 102: rear glass manufacturing, 103: glass panel assembly, 20: panel damage evaluation process, 201: heat applied panel evaluation, 30: panel Module manufacturing process, 3
01: connection of external control circuit, 302: mounting of holding member,
303: mounting of driving circuit, 40: inspection / quality control process, 40
1 ... Performance evaluation, 402 ... Acceleration of reliability evaluation, 50 ... Shipment process, 501 ... Packing, 502 ... Shipment.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C012 AA09 BE02 5C040 GA09 GC19 JA26 MA23 5C058 AA11 AB01 BA35 5G435 AA12 BB06 EE33 KK05 KK10

Claims (10)

[Claims] 1. A heater unit for applying heat or heat and external pressure to one or both surfaces of a part or the whole of a glass surface or a glass holding member of a plasma display panel having no control driving circuit for a plasma display element. Wherein the heater unit forcibly applies heat or heat and an external pressure to the panel, and a means for checking whether the panel is damaged or abnormal due to the applied thermal stress is provided. Plasma display panel evaluation device. 2. The plasma display panel evaluation according to claim 1, wherein the heater section is made of a member having good heat conduction in order to make the heating temperature of the heater section used for heating uniform. apparatus. 3. The plasma display panel evaluation apparatus according to claim 2, wherein a heat pipe is used as the member having good heat conduction. 4. The plasma display panel evaluation apparatus according to claim 1, further comprising a timer unit for enabling time control of heating application to the heater unit. 5. The plasma display panel evaluation apparatus according to claim 1, further comprising a heating temperature adjusting section for changing a heating temperature of the heater section. 6. The apparatus according to claim 1, wherein the heater is at least one or more, and a moving unit for moving the heater is provided, and the heating unit can be freely moved by the moving unit to change a heating position. Plasma display panel evaluation device characterized by what it can do. 7. The heating device according to claim 1, wherein the heater portion used for heating is constituted by a far-infrared heater or a hot-air heater, and the heater is in non-contact with a glass surface of the panel or a part of a glass holding member. A plasma display panel evaluation apparatus characterized by heating. 8. The panel according to claim 2, wherein the heater used for heating is a glass surface of the panel.
Alternatively, when heating by contacting a part of the glass holding member, a sensor that detects a heating temperature of the heater unit itself and a temperature of the heating surface and a non-heating unit extremely adjacent to the heating surface is provided, and the heater is the heater. A plasma display panel evaluation apparatus, wherein the amount of heat lost due to contact with a heating surface is detected by the sensor and corrected by the heater to realize a desired panel heating temperature. 9. The method according to claim 7, wherein the heater portion used for heating is heated in a non-contact manner on a glass surface of the panel or a part of a glass holding member.
A sensor for detecting a heating temperature of the heater unit itself and a temperature of the heating surface, and correcting a heating temperature of the heater unit with respect to a measured temperature of the heating surface temperature detected by the sensor, thereby providing an evaluator. A plasma display panel evaluation apparatus for realizing a desired panel heating temperature. 10. A glass panel manufacturing step of fixing a front glass and a rear glass of a plasma display panel with a frit material, injecting an injection gas required for plasma discharge, and sealing the glass panel, and the glass panel manufacturing step. Manufacturing a panel module for a plasma display panel, comprising: a panel module manufacturing process for mounting an external control circuit and a drive circuit on the plasma display panel, an inspection / quality control process for evaluating and confirming quality, and a shipping process for packing. In the step, a panel damage evaluation step of confirming whether or not there is a risk of damage due to thermal stress of the panel using the plasma display panel evaluation apparatus according to claim 1 is performed between a glass panel manufacturing step and a panel module manufacturing step. By adding the external control circuit to the panel. No need for connection and installation of drive circuits, wiring work between circuits, and input of control signals, no need for discharge emission of the plasma display panel, and the possibility of evaluating and confirming the risk of damage to the panel. A panel module manufacturing process for a plasma display.